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Volume 18, Number 7—July 2012


Multiple Introductions of Avian Influenza Viruses (H5N1), Laos, 2009–2010

Stephanie SonnbergComments to Author , Phouvong Phommachanh, Tri Satya Putri Naipospos, Joanna McKenzie, Chintana Chanthavisouk, Som Pathammavong, Daniel Darnell, Phetlamphone Meeduangchanh, Adam M. Rubrum, Mahanakhone Souriya, Bounkhouang Khambounheuang, Richard J. Webby, Bounlom Douangngeun, and Robert G. Webster
Author affiliations: St. Jude Children’s Research Hospital, Memphis, Tennessee, USA (S. Sonnberg, D. Darnell, A.M. Rubrum, R.J. Webby, R.G. Webster); National Animal Health Centre, Vientiane, Laos (P. Phommachanh, P. Meeduangchanh, B. Douangngeun); Food and Agriculture Organization of the United Nations, Rome, Italy (T.S.P. Naipospos, J. McKenzie, C. Chanthavisouk, S. Pathammavong); and; Ministry of Agriculture and Forestry, Vientiane (M. Souriya, B. Khambounheuang)

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Table 1

Genotypes of 21 surveillance samples of avian influenza virus (H5N1) and outbreak virus A/chicken/Lao/LH1/2010, Laos, 2009–2010*

Sample ID Sample type Location† Sampling site Gene‡
A/ck/LH1 Chicken Vientiane Farm 2.3.4
210317 Duck Xiengkhouang-1 Market NA NA 2.3.4
210265 Duck Luang Namtha-1 Backyard NA NA 2.3.4 NA
210281 Env Champasak-1 Market NA NA 2.3.2 NA
210287 Duck Champasak-1 Market NA 2.3.2
210289 Duck Champasak-1 Market 2.3.2
210252 Duck Luang Namtha-1 Backyard 2.3.4
210253 Duck Luang Namtha-1 Backyard 2.3.4
210255 Duck Luang Namtha-1 Backyard 2.3.4
210358 Duck Xiengkhouang-2 Backyard 2.3.4
210360 Duck Xiengkhouang-2 Backyard NA 2.3.4
210361 Duck Xiengkhouang-2 Backyard 2.3.4
210363 Env Xiengkhouang-2 Backyard 2.3.4
210367 Duck Xiengkhouang-2 Backyard NA 2.3.4
210374 Duck Xiengkhouang-2 Backyard 2.3.4
210376 Env Xiengkhouang-2 Backyard 2.3.4
210378 Env Xiengkhouang-2 Backyard 2.3.4
210379 Duck Xiengkhouang-2 Backyard 2.3.4
210380 Duck Xiengkhouang-2 Backyard 2.3.4
210385 Duck Xiengkhouang-2 Backyard 2.3.4
210386 Duck Xiengkhouang-2 Backyard 2.3.4
210349 Duck Savanakhet-1 Farm 2.3.4 NA

*Boldface indicates outbreak virus isolate and closely related isolates. ID, identification; PB, polymerase basic; PA, polymerase acidic; H, hemagglutinin; NP, nucleoprotein; N, neuraminidase; M, matrix; NS, nonstructural; NA, not available; env, environmental.
†Identical numbers indicate same sampling site.
‡Pink shading, A/Guizhou/1/2009-like clade; blue shading, A/whooper swan/Mongolia/6/2009-like clade; purple shading, A/tree_sparrow/Jiangsu/1/08-like clade 2.3.4; gray shading, A/environment/Guizhou/4/2009-like clade
§Clade is indicated.

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